In Microsoft Stream, you share a video to an external or Azure Business to Business user. When the user tries to access the video, they see the following error message:
This video isn't available.
There's something wrong with the video ID for this page.
@Lewis-H Thank you for the feedback this is similar to what is discussed here: https://techcommunity.microsoft.com/t5/microsoft-stream-forum/microsoft-stream-will-not-load-in-edge...
On the public roadmap for later in CY2020: https://www.microsoft.com/en-us/microsoft-365/roadmap?featureid=27728